We have a sock and I managed to fly the spinnaker while solo* a couple weekends ago. I put it up, enjoyed looking sailing with it, dowsed it. It's no problem at all if you have a sock and an autopilot.
50 foot boat, so the sock comes in handy. If you solo, you might consider it too, but I flew my spinnaker on my no-autopilot Victory 21 any time I wanted. Just run the lines ahead of time and launch it right out of the cockpit.
I'd think that on a 19 foot boat it's too much hardware for what you are doing. Easy-enough without a sock.
Spend the money on something that your lady friend will like, like dinner or lunch ashore at a restaurant that you sail to.
*ok, DavidPM was on the boat as a safety measure but he agree to not do anything unless I needed help.
Great minds discuss ideas;
Average minds discuss events;
Small minds discuss people.
The best minds discuss sailing, anchors, batteries, rode length, fridge-or-not, freezer-or-not, and guns-on-board. I don't know why. It's a mystery!